1 /* $NetBSD: device.c,v 1.2 1997/03/25 03:07:06 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1993-95 Mats O Jansson. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by Mats O Jansson. 17 * 4. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef LINT 33 static char rcsid[] = "$NetBSD: device.c,v 1.2 1997/03/25 03:07:06 thorpej Exp $"; 34 #endif 35 36 #include "os.h" 37 #include "common/common.h" 38 #include "common/mopdef.h" 39 40 struct if_info *iflist; /* Interface List */ 41 42 void mopReadDL(); 43 void mopReadRC(); 44 #ifdef NO__P 45 int mopOpenDL(/* struct if_info *, int */); 46 int mopOpenRC(/* struct if_info *, int */); 47 #else 48 int mopOpenDL(struct if_info *, int); 49 int mopOpenRC(struct if_info *, int); 50 #endif 51 int pfTrans(); 52 int pfInit(); 53 int pfWrite(); 54 55 #ifdef DEV_NEW_CONF 56 /* 57 * Return ethernet adress for interface 58 */ 59 60 void 61 deviceEthAddr(ifname, eaddr) 62 char *ifname; 63 u_char *eaddr; 64 { 65 char inbuf[8192]; 66 struct ifconf ifc; 67 struct ifreq *ifr; 68 struct sockaddr_dl *sdl; 69 int fd; 70 int i, len; 71 72 /* We cannot use SIOCGIFADDR on the BPF descriptor. 73 We must instead get all the interfaces with SIOCGIFCONF 74 and find the right one. */ 75 76 /* Use datagram socket to get Ethernet address. */ 77 if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { 78 syslog(LOG_ERR, "deviceEthAddr: socket: %m"); 79 exit(1); 80 } 81 82 ifc.ifc_len = sizeof(inbuf); 83 ifc.ifc_buf = inbuf; 84 if (ioctl(fd, SIOCGIFCONF, (caddr_t)&ifc) < 0 || 85 ifc.ifc_len < sizeof(struct ifreq)) { 86 syslog(LOG_ERR, "deviceEthAddr: SIOGIFCONF: %m"); 87 exit(1); 88 } 89 ifr = ifc.ifc_req; 90 for (i = 0; i < ifc.ifc_len; 91 i += len, ifr = (struct ifreq *)((caddr_t)ifr + len)) { 92 len = sizeof(ifr->ifr_name) + ifr->ifr_addr.sa_len; 93 sdl = (struct sockaddr_dl *)&ifr->ifr_addr; 94 if (sdl->sdl_family != AF_LINK || sdl->sdl_type != IFT_ETHER || 95 sdl->sdl_alen != 6) 96 continue; 97 if (!strncmp(ifr->ifr_name, ifname, sizeof(ifr->ifr_name))) { 98 bcopy((caddr_t)LLADDR(sdl), (caddr_t)eaddr, 6); 99 return; 100 } 101 } 102 103 syslog(LOG_ERR, "deviceEthAddr: Never saw interface `%s'!", ifname); 104 exit(1); 105 } 106 #endif /* DEV_NEW_CONF */ 107 108 void 109 deviceOpen(ifname, proto, trans) 110 char *ifname; 111 u_short proto; 112 int trans; 113 { 114 struct if_info *p, tmp; 115 116 strcpy(tmp.if_name,ifname); 117 tmp.iopen = pfInit; 118 119 switch (proto) { 120 case MOP_K_PROTO_RC: 121 tmp.read = mopReadRC; 122 tmp.fd = mopOpenRC(&tmp, trans); 123 break; 124 case MOP_K_PROTO_DL: 125 tmp.read = mopReadDL; 126 tmp.fd = mopOpenDL(&tmp, trans); 127 break; 128 default: 129 break; 130 } 131 132 if (tmp.fd != -1) { 133 134 p = (struct if_info *)malloc(sizeof(*p)); 135 if (p == 0) { 136 syslog(LOG_ERR, "deviceOpen: malloc: %m"); 137 exit(1); 138 } 139 140 p->next = iflist; 141 iflist = p; 142 143 strcpy(p->if_name,tmp.if_name); 144 p->iopen = tmp.iopen; 145 p->write = pfWrite; 146 p->read = tmp.read; 147 bzero((char *)p->eaddr,sizeof(p->eaddr)); 148 p->fd = tmp.fd; 149 150 #ifdef DEV_NEW_CONF 151 deviceEthAddr(p->if_name,&p->eaddr[0]); 152 #else 153 p->eaddr[0]= tmp.eaddr[0]; 154 p->eaddr[1]= tmp.eaddr[1]; 155 p->eaddr[2]= tmp.eaddr[2]; 156 p->eaddr[3]= tmp.eaddr[3]; 157 p->eaddr[4]= tmp.eaddr[4]; 158 p->eaddr[5]= tmp.eaddr[5]; 159 #endif /* DEV_NEW_CONF */ 160 161 } 162 } 163 164 void 165 deviceInitOne(ifname) 166 char *ifname; 167 { 168 char interface[IFNAME_SIZE]; 169 struct if_info *p; 170 int trans; 171 #ifdef _AIX 172 char dev[IFNAME_SIZE]; 173 int unit,j; 174 175 unit = 0; 176 for (j = 0; j < strlen(ifname); j++) { 177 if (isalpha(ifname[j])) { 178 dev[j] = ifname[j]; 179 } else { 180 if (isdigit(ifname[j])) { 181 unit = unit*10 + ifname[j] - '0'; 182 dev[j] = '\0'; 183 } 184 } 185 } 186 187 if ((strlen(dev) == 2) && 188 (dev[0] == 'e') && 189 ((dev[1] == 'n') || (dev[1] == 't'))) { 190 sprintf(interface,"ent%d\0",unit); 191 } else { 192 sprintf(interface,"%s%d\0",dev,unit); 193 } 194 #else 195 sprintf(interface,"%s",ifname); 196 #endif /* _AIX */ 197 198 /* Ok, init it just once */ 199 200 p = iflist; 201 for (p = iflist; p; p = p->next) { 202 if (strcmp(p->if_name,interface) == 0) { 203 return; 204 } 205 } 206 207 syslog(LOG_INFO, "Initialized %s", interface); 208 209 /* Ok, get transport information */ 210 211 trans = pfTrans(interface); 212 213 #ifndef NORC 214 /* Start with MOP Remote Console */ 215 216 switch (trans) { 217 case TRANS_ETHER: 218 deviceOpen(interface,MOP_K_PROTO_RC,TRANS_ETHER); 219 break; 220 case TRANS_8023: 221 deviceOpen(interface,MOP_K_PROTO_RC,TRANS_8023); 222 break; 223 case TRANS_ETHER+TRANS_8023: 224 deviceOpen(interface,MOP_K_PROTO_RC,TRANS_ETHER); 225 deviceOpen(interface,MOP_K_PROTO_RC,TRANS_8023); 226 break; 227 case TRANS_ETHER+TRANS_8023+TRANS_AND: 228 deviceOpen(interface,MOP_K_PROTO_RC,TRANS_ETHER+TRANS_8023); 229 break; 230 } 231 #endif 232 233 #ifndef NODL 234 /* and next MOP Dump/Load */ 235 236 switch (trans) { 237 case TRANS_ETHER: 238 deviceOpen(interface,MOP_K_PROTO_DL,TRANS_ETHER); 239 break; 240 case TRANS_8023: 241 deviceOpen(interface,MOP_K_PROTO_DL,TRANS_8023); 242 break; 243 case TRANS_ETHER+TRANS_8023: 244 deviceOpen(interface,MOP_K_PROTO_DL,TRANS_ETHER); 245 deviceOpen(interface,MOP_K_PROTO_DL,TRANS_8023); 246 break; 247 case TRANS_ETHER+TRANS_8023+TRANS_AND: 248 deviceOpen(interface,MOP_K_PROTO_DL,TRANS_ETHER+TRANS_8023); 249 break; 250 } 251 #endif 252 253 } 254 255 /* 256 * Initialize all "candidate" interfaces that are in the system 257 * configuration list. A "candidate" is up, not loopback and not 258 * point to point. 259 */ 260 void 261 deviceInitAll() 262 { 263 #ifdef DEV_NEW_CONF 264 char inbuf[8192]; 265 struct ifconf ifc; 266 struct ifreq *ifr; 267 struct sockaddr_dl *sdl; 268 int fd; 269 int i, len; 270 271 if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { 272 syslog(LOG_ERR, "deviceInitAll: socket: %m"); 273 exit(1); 274 } 275 276 ifc.ifc_len = sizeof(inbuf); 277 ifc.ifc_buf = inbuf; 278 if (ioctl(fd, SIOCGIFCONF, (caddr_t)&ifc) < 0 || 279 ifc.ifc_len < sizeof(struct ifreq)) { 280 syslog(LOG_ERR, "deviceInitAll: SIOCGIFCONF: %m"); 281 exit(1); 282 } 283 ifr = ifc.ifc_req; 284 for (i = 0; i < ifc.ifc_len; 285 i += len, ifr = (struct ifreq *)((caddr_t)ifr + len)) { 286 len = sizeof(ifr->ifr_name) + ifr->ifr_addr.sa_len; 287 sdl = (struct sockaddr_dl *)&ifr->ifr_addr; 288 if (sdl->sdl_family != AF_LINK || sdl->sdl_type != IFT_ETHER || 289 sdl->sdl_alen != 6) 290 continue; 291 if (ioctl(fd, SIOCGIFFLAGS, (caddr_t)ifr) < 0) { 292 syslog(LOG_ERR, "deviceInitAll: SIOCGIFFLAGS: %m"); 293 continue; 294 } 295 if ((ifr->ifr_flags & 296 (IFF_UP | IFF_LOOPBACK | IFF_POINTOPOINT)) != IFF_UP) 297 continue; 298 deviceInitOne(ifr->ifr_name); 299 } 300 (void) close(fd); 301 #else 302 int fd; 303 int n; 304 struct ifreq ibuf[8], *ifrp; 305 struct ifconf ifc; 306 307 if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { 308 syslog(LOG_ERR, "deviceInitAll: old socket: %m"); 309 exit(1); 310 } 311 ifc.ifc_len = sizeof ibuf; 312 ifc.ifc_buf = (caddr_t)ibuf; 313 if (ioctl(fd, SIOCGIFCONF, (char *)&ifc) < 0 || 314 ifc.ifc_len < sizeof(struct ifreq)) { 315 syslog(LOG_ERR, "deviceInitAll: old SIOCGIFCONF: %m"); 316 exit(1); 317 } 318 ifrp = ibuf; 319 n = ifc.ifc_len / sizeof(*ifrp); 320 for (; --n >= 0; ++ifrp) { 321 if (ioctl(fd, SIOCGIFFLAGS, (char *)ifrp) < 0) { 322 continue; 323 } 324 if (/*(ifrp->ifr_flags & IFF_UP) == 0 ||*/ 325 ifrp->ifr_flags & IFF_LOOPBACK || 326 ifrp->ifr_flags & IFF_POINTOPOINT) 327 continue; 328 deviceInitOne(ifrp->ifr_name); 329 } 330 331 (void) close(fd); 332 #endif /* DEV_NEW_CONF */ 333 } 334